On Wed, 1 May 2002, Philip wrote:
> u are right. u will need a much longer contact time to achieve the same
> bacteria kill. i can't give a figure off hand, but i guess it will be in the
> order of 100 times that of chlorine.
>> try some references from water supply/ environmental engineering. u might
> have better luck posting to the civil or chemical engr newgp.
. . . is this because the chlorine exists partly as ammonium chloride and
in that form is less good at killing? Does the original poster actually
have a pathogen problem? Can he do some small scale testing? Regards,